Kentucky Senator Rand Paul is wading into the nation’s most incendiary Senate race this week, with the launch of a new statewide, six-figure ad campaign to help Missouri Republican Todd Akin.

Business Insider has learned that Paul’s political action committee, RANDPAC, will go on air Wednesday with a new ad attacking Akin’s opponent, Democratic Senator Claire McCaskill, for her vote against Paul’s amendment to block U.S. aid to Pakistan, Egypt, and Libya.